Brake-beam.



` J. A. LAMONT.

EAM.

BRAKE B .AlLIGATIoH FILED MAY 31,1910.

Patented EN. l.

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S l l/ {l} A. LMONT.

BRAKE BEAM.

mymomlop HL2!) MAY 31,1910.

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Patented New. 1,1910.

UNITED sTATEs .PATENT OFFICE.

JOHN A. LAMONT, OF ST. LOUIS, MISSOURI, ,ASSIGNOR TO AMERICAN STEELFOUNDRIS,

OF CHICAGO, ILLINOIS, A CORPORATION 0F rNEW JERSEY.

.BRAKE-BEAM.

Specification of Letters Patent.

Application @led VMay 31,

Patented N ov. 1, 1910. 1910. serial no. 564,335.

' of brake beams on high speed trains that tion of inside hung beams,there is a' limited.

there shouldy be as little deectionin vthe beam as it is possible tosecure. vThis vwill bereadily understood fromthefactthat the motion fromthe brake bea-m to the air brake cylinder is greatly multiplied and thata slight deiiection'in the beam will .require a `much greater movementat the air brake cylinder. Y,

Therefore one of the principal objects of the present invention is tosecure brake -beam of maximum stiffness Aand minimum weight for thestrength produced.

Itis also well knownthat in the .applicaavailable space,.`and in orderto secure a beam of the requisite stiffness, the parts Inustbe quiteheavy and cumbersome yat the ends and the spaceis often so limited thatit is impossible togive the members their desirable thickness. :'To thatend Ihaveconstructed my brake beam of cast metal,.and so proportionedthe--parts that `the requisite stiffness is Vsecured in a,limitedamountof space I yam laware .that one '.piece .cast-brake beamsare notnew with`my invention, but.. believe myself to be the first to provide a de--sign ofonepiece brake beam whichinay be lmanufactured Vof castste'elvand 1n channel form, that is, ay trussed brake oeamhaving vitscompressionr member, vtension member,

- -middle support and ends all cast integral .and united .ati differentpoints between its'.

ends by a web, which lies in aplane of one `.side only of 4thecompression 4and tension.

members.

In high speed beams of tlus character, 1t

is also essentialto -provide abra-ke headA which may be adjusted on thebeam in order that it may be fitted to .theperiphery o t' the wh eel atwhatever height the beam is hung,

and` I have shown a form of adjustable head which I consider to vbesimpleand efficient and which isparticularly adapted Afor appliL cationto a beam of this construction.

My invention will be more readily understood y by reference to theaccompanying drawings, wherein,

Figure \-1` is a plan view of myl improved brake beam; FigQ-is asideelevation thereof, showing` one of the ends in section; Fig. 3 is asection through the center of the beam showing my improved suspensionlug secured thereto; Figs. 4 and are views of the said suspension lug;Fig. 6 is an end elevation ofthe brake beam 'and adjustable brake head,part of the head being broken away to rshow the mechanism, and, Fig. 7is a view, partly inseetion, lshowing more clearly `the brake headsecuring means.

My improved brake beam' isp'composed of a ycompression member, 10,tension member, l1, andmiddle support, orstr'ut, 12. It is providedwithv cylindrical `end portions, '18,

and the kcompression and 'tension members means of webs, 14. In order tolessen the weight, I preferito cut out portions of these webs, andaround the cut-out portions I ,provide-ribs, 15a, as best-shown in Fig.3. Neaiutheends r4of the beam the webs, 14, increase inthickness, asshown in Fig. 2, until fat thepoint` wherethe compression and tensionmembers unite, thcweb is of a width `equal to thc diameter ot' thecylindrical end ...portions,`l3, thus insuring a rigid end construction.

As shown in Fig, 1, the strut, 12, is provided with the usual opening,15, therethrough, ,and while'the suspension lug or extension bracket maybe cast integral with \the.remaini1ig parts, I refer to cast it as a.separatepieca as at, 1P?, Figs. 3, et and 5. This part Y.17, fit-ssnugly into the lower end Aof the cas b\eam portion and is united there-.tobykmeans of the bolts 18. The cylindrical ends13, yof .thebeani areprovided with .in tersectingopeningsslQ, 19, the latterbeing concentricand they tor-mer intersecting the same at right angles, these beingprovided `for a purpose hereinafterdescribed. Brake heads, 9.0,` aremounted upon these cylindri* zcalends or trunnions, and are of a common`form.` ,As shown, the. head is provided with a cylindrical opening, 21,of a size permitl ting the head to rotate freely uportthe trunein loyedto prevent the bolt from turning.

sol

' on the bolt, 28, and the nut, 33, secures it port, Webs joining saidcompression and tension members at pointsj'tween their united dricalbarrel is also provided with an opening, 24, 'A headedbolt, 25, ismounted in the conrskilled in the art of casting steel.

tl'nsopening The lower end of the cylint right anglesto the opening, 22.

centricopening, V19", and its screw threaded end, 26eo-acting with thethreads on the interior di the opening, secures the head upon thetrunnion. A nut-lock, 27, may be A olt, 28, is mounted at right anglesto the bolt, 25, 'and its end is in the form of an eye, having theopening, 29, therethrough.` This bolt is adapted to be suspended orswung from the bolt, 25, and is provided With `a threaded end, 30. Theoutside edge, 31, of the brake head barrel is roughened or providedwithteeth and the nut or locking block, 32, also provided With teeth, isvmounted on the bolt, 28, and is forced into engagement with the outsideof the barrel by means of the nut, 33, this nut being locked by means ofthe cotter, 34.

As Will be seen, the headl is first slipped over the cylindrical endporti'igtis, 13,-ot' the beam, the bolt, 28, is next raised into place,the bolt, 25, being then placed and driven tight, the nut-lock securingit against rotation. The locking block, 30, is then placed tightlyagainst the surface of the brake head. As Will be seen, the head has alimited amount of motion When the locking block, 32, is loose, and maybe fixed in any adjusted osition with little trouble.

The rake beam as illustrated in Figs. l and 2, I consider tobe of themost desirable form for casting in steel. As will be seen, the parts areof practically uniform crosssection throughout, With the exception ofthe cylindrical ends, and this is particularly desirable, will beunderstood by' those I also consider the channel shape of the beam to bepreferable for brake beams. v

It will be understood many different forms of adjustable brake heads maybe applied to my beam, a'nd also that the head, as

ere illustrated, may be applied to other forms of. brake beams, and I donot therefore limit myself to the exact constructions herein shownanddescribed.

I claim:v i

1v. A brake beam having va compression member, a tension member, amiddlesupends vand trunnions formed at theends of said compression andtension members, allv the parts being cast in a single piece, iii com`bination With brake headsmounted for ro-`.

2. A brakeubeam' comprising compression and tension members, a webuniting said compression and`tension members at points between theirends, trunnions at the meeting point of said compression and tensionmeinbers, the parts all being cast in a single piece, in combinationwith a center suspension lug secured to said integral casting,substantially as described. f

3. A brakebe'am of the class described, of general channel shape incross section and provided With'integral trunnions at its ends, the Webof said channel being provided with openings therethrough, andstrengthening ribs around said openings, sulistantially as described.

4. A one piece brake bcain provided with trunnions upon its ends, saidtrunnions having apertures therein, in combination with a brake headmounted for rotation upon each of said trunnions, intersecting boltsmounted Within the openings in said trunnions and means whereby each otsaid. heads is positively held against rotation` substantiall)l asdescribed.. Y Y,

5. A brake; beam having trunnions upon its ends,leach` of said trunnionsbeing provided with openings formed at right angles to each other, incombination 'with a--brake head rotatablyl mounted upon each or' saidtrunnions, bolts mounted in the openings of and concentric with said`trunnions, said bolts being adapted to securel said heads upon saidtrunnions, eye-bolts mounted in the other of said openings and retainedin place by the `-concentric bolts, toothed nuts held by said eye-boltsand adapted to co-act with the outer' surface of the brake heads, andmeans for forcing saidtoothed nuts tightly against the outer surface of'said brake heads, substantially as described.

VG. A brake"'beani having integral trunnions uponits ends, saidtrunnions being providedwith intersecting openings, in coinbinationWith'adjustable brake heads mounted upon trunnions, bolts extendingthrough said brake heads and into ,said intersecting openings, and meansupon the eX- terior of said brake heads for locking the same in adjustedpositions, substantially as described.

` JOHN A. LAMONT. vWitnesses: n f

E. B. SHnnznn, Jas. H. Louis.

